HYDROLOGIC SURVEY
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RECOMMENDATIONS

A second phase of the Hydrologic Survey is recommended, with a particular focus on the Highlands, Old Town, and Beach Park areas. Additional monitoring wells will be needed in the area, as well as analysis of the hydrogeology, streamflow conditions, and impacts on water resources of wastewater disposal.

The District's routine water monitoring program should be revised to include a set of reliable groundwater monitoring wells that cover not only the Seadrift, Calles, and Patios areas, but also the Highlands and Old Town. Monitoring should be extended to include wet season water level measurements and sampling.

A community STEP system may be warranted to serve the Old Town area, as well as portions of the Highlands, Calles, and Patios areas. A potential site exists in the vicinity of the Highlands Tank on federal park land. Implementation of a STEP system in Stinson Beach will require cooperative efforts with the federal government, and potentially could be done in a way that would improve the existing waste disposal practices within the park itself.

The District should consider broadening the onsite wastewater disposal system criteria to allow variations in wastewater practices and innovative technologies, including changes in leachfield application rates, recirculating sand filters, aerobic treatment systems, ultraviolet disinfection systems, and subsurface drip irrigation systems.

The District should consider implementation of monitoring system improvements including data recording control panels and expansion of reporting requirements for septic tank maintenance.






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